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#include <bits/stdc++.h>
using namespace std;

using u64 = uint64_t;
using i64 = int64_t;
using ci64 = int64_t const;
using vi = vector<i64>;
using vvi = vector<vector<i64>>;
using cvi = vector<i64> const;
using cvvi = vector<vector<i64>> const;


// print tuples {{{
template <typename T1, typename T2>
ostream& operator<<(ostream& os, const pair<T1, T2>& t) {
    return os << '[' << t.first << ',' << t.second << ']';
}
void print_tpl_helper(ostream&, bool) {}
template <typename T, typename ...Ts>
void print_tpl_helper(ostream& os, bool first, const T& v, const Ts& ...vs) {
    if (!first){os << ',';} os << v; print_tpl_helper(os, false, vs...);
}
template <typename ...Ts>
ostream& print_struct(ostream& os, const char* classname, const Ts& ...vs) {
        // todo: named fields
    os << classname << '('; print_tpl_helper(os, true, vs...); return os << ')';
}
struct Example {
    char symbol;
    u64 val;
    friend ostream& operator<<(ostream& os, const Example& elem) {
        return print_struct(os, "Op", elem.symbol, elem.val);
    }
};
// }}}
// print containers {{{
template <typename It>
void print(ostream& os, It begin, It end, u64 len, u64 limit = 17) {
    u64 count = 0;
    os << "{";
    while (begin != end && count < limit) {
        os << "(" << *begin << ")";
        count++;
        begin++;
    }
    if (begin != end)
        os << "... " << len << " total";
    os << "}";
}
#define MAKE_PRINTER_1(container) \
template <typename T> ostream& operator<<(ostream& os, const container<T>& t) { print(os, t.begin(), t.end(), t.size()); return os; }
#define MAKE_PRINTER_2(container) \
template <typename T1, typename T2> \
ostream& operator<<(ostream& os, const container<T1, T2>& t) { \
    print(os, t.begin(), t.end(), t.size()); \
    return os; \
}
MAKE_PRINTER_1(vector)
MAKE_PRINTER_2(map)
MAKE_PRINTER_1(set)
MAKE_PRINTER_2(unordered_map)
MAKE_PRINTER_1(unordered_set)
#undef MAKE_PRINTER_1
#undef MAKE_PRINTER_2
// }}}
// read/write {{{
template <typename T> T read() { T e; cin >> e; return e; }
void read() {}
template <typename T, typename ...Ts> void read(T& v, Ts& ...ts) { v = read<T>(); read(ts...); }
template <typename T> vector<T> readv(u64 n) { vector<T> v; for (u64 i = 0; i < n; i++) v.push_back(read<T>()); return v; }
template <typename T> struct identity { const T& operator()(const T& t) const { return t; } };
#define PRINTERS(FNAME, OUTP) \
    template <typename T> void FNAME(const T& t) { OUTP << t << ' '; } \
    void FNAME##ln() { OUTP << '\n'; } \
    template <typename T> void FNAME##ln(const T& t) { OUTP << t << '\n'; } \
    template <typename T, typename F = identity<typename T::value_type>> \
    void FNAME##v(const T& t, F f = F()) { for (const auto& e : t) FNAME(f(e)); FNAME##ln(); }
PRINTERS(print, cout)
#ifdef DEBUG_PRINTS
    PRINTERS(dprint, cerr)
#else
# define dprint(...)
# define dprintv(...)
# define dprintln(...)
#endif
/// }}}
// range, len, max {{{
vi range(i64 start, i64 end) {
    vi v;
    for (i64 i = start; i < end; i++)
        v.push_back(i);
    return v;
}
vi range(i64 end) { return range(0, end); }
template <typename DS>
i64 len(DS t) { return (i64)t.size(); }
template <typename DS>
i64 tmax(DS t) {
    if (t.empty()) {
        dprintln("'max' on empty range, returning 0.");
        return 0;
    }
    return *max_element(t.begin(), t.end());
}
// }}}

i64 gp10(i64 b) {
    if (b >= 21)
        b = 21;
    i64 res = pow(static_cast<double>(10), b);
    if (res % 10 == 9)
        ++res;
    return res;
}

i64 cdigs(i64 x) {
    if (x == 0)
        return 0;
    i64 res = 1;
    while (x /= 10)
        ++res;
    return res;
}

struct Exp {
    i64 a, k, b;
    i64 da;
    i64 value() const {
        if (k >= 21)
            return 42ll;
//        return 42ll;
        return a * gp10(k) + b;
    }

    i64 full_len() const {
        return da + k;
    }

    i64 get_prefix(i64 digs) const {
        ci64 adigs = da;
        ci64 full_len = adigs + k;
        if (digs >= full_len)
            return value();
        if (digs <= adigs)
            return a / gp10(adigs - digs);
        i64 res = a * gp10(digs - adigs);
        res = res + b / gp10(full_len - digs);
        return res;
    }

    void increment() {
        ++b;
        if (b != gp10(k))
            return;
        ++a;
        if (a == gp10(da))
            ++da;
        b = 0;
    }
};

i64 max(i64 a, i64 b) { return a < b ? b : a; }

void go() {

    ci64 n = read<i64>();
//    ci64 n = 13;

//    dprintln(cdigs(1));
//    dprintln(cdigs(10));
//    dprintln(cdigs(99));
//    dprintln(cdigs(666));
    //println("here");
   // {
   //     Exp e = {47, 2, 0};
   //     dprint(e.a); dprint(e.k); dprintln(e.b);
   //     dprintln(e.value());
   //     e.increment();
   //     dprint(e.a); dprint(e.k); dprintln(e.b);
   //     dprintln(e.value());
   //     dprintln(e.get_prefix(3));
   // }
   // return;

    Exp e = {};
    i64 res = 0;
    for (ci64 i : range(n)) {
        e.increment();
        ci64 x = read<i64>();
        i64 xdigs = cdigs(x);
        i64 e_full_len = e.full_len();
        //ci64 epref = x;
        ci64 epref = e.get_prefix(xdigs);
        if (epref < x) {
            e.k = max(0ll, e_full_len - xdigs);
            e.a = x;
            e.da = xdigs;
            e.b = 0;
        } else if (epref > x) {
            e.k = max(0ll, e_full_len - xdigs + 1ll);
            e.a = x;
            e.da = xdigs;
            e.b = 0;
        }
        //dprint(e.a); dprint(e.k); dprint(e.b);
        res += e.full_len() - xdigs;
        dprintln(e.value());
//        dprint(e.a); dprint(e.k); dprintln(e.b);
    }
    println(res);


//    while (true) {
//        Exp e;
//        dprintln("provide a, k, b");
//        read(e.a, e.k, e.b);
//        while (true) {
//            dprint("value:"); dprintln(e.value());
//            string s;
//            dprintln("e - provide again; i - increment; p <num> - prefix");
//            read(s);
//            if (!s.size() || s[0] == 'e')
//                break;
//            if (s[0] == 'i')
//                e.increment();
//            else {
//                print("prefix:"); println(e.get_prefix(read<i64>()));
//            }
//        }
//    }
}


int main () { // {{{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    go();
} //